http://www.computerandvideogames.com/article.php?id=210065
I heard Jordan Thomas, Creative Director on Bioshock 2 at 2K Marin, worked as lead designer on Thief: Deadly Shadow and designed Fort Frolic area on Bioshock 1. Zak McClendon, Lead Designer on Bioshock 2, worked on systems / level designer on Project: Snowblind at Crystal Dynamics.